Page:Birds of North and Middle America partV Ridgway.djvu/212

184 to rather large, strongly curved, acute, that of the hallux decidedly shorter than the digit.

Coloration. — Wings and tail (usually pileum also) cinnamon-rufous rest of upper parts plain brown; under parts plain pale brownish gray, light grayish brown, or dull buffy. Sexes alike.

Range. — Costa Rica to Ecuadór (at least). (Many species.)

a. Pileum, at least, rufous. (Adults.)
 * b. Loral, orbital, auricular, and malar regions rufous; crown without black streaks (Acrorchilus erythrops.)
 * c. Middle pair of rectrices russet-brown. (Ecuadór.)

Acrorchilus erythrops erythrops (extralimital).
 * cc. Middle pair of rectrices bright cinnamon-rufous, like rest of tail.
 * d. Rufous of head less extended, the occiput and nape brown, like back; chest and lower throat light buffy olive. (Costa Rica and Panamá.)

Acrorchilus erythrops rufigenis, adults (p. 185).
 * dd. Rufous of head more extended, involving occiput and nape; chest mouse gray fading into nearly ash gray on throat. (Northwestern Colombia.)

Acrorchilus erythrops griseigularis (extralimital).
 * bb. Loral, orbital, auricular, and malar regions buffy brownish, the superciliary region narrowly streaked with whitish; forehead and crown streaked with black. (Colombia to Ecuadór.)

Acrorchilus antisiensis (extralimital). aa. Pileum without rufous. Acrorchilus erythrops rufigenis, young (p. 185).

ACRORCHILUS ERYTHROPS RUFIGENIS (Lawrence).

Similar to A. e. erythrops Sclater, of Ecuadór, but middle pair of rectrices bright cinnamon-rufous (hke other rectrices), instead of russet brown, cinnamon-rufous of head deeper and more extended (occupying whole of auricular and greater part of malar regions, as well as orbital, loral, supercillary, and supra-auricular regions as well as forehead and crown), general coloration darker, and size larger.